b959398a698e3e7b4b18306724d9aa2d697956c6a160725f6d9a3a1c0699a1d4

Analysis

max time kernel
397s
max time network
363s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-09-2024 11:35

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General

Target

oxhzulzwrt.exe
Size

137KB
MD5

a7c87a3414b9f40f48700c10391d5980
SHA1

97e195564d3b1b394e730d2cbe0369243c81149d
SHA256

b959398a698e3e7b4b18306724d9aa2d697956c6a160725f6d9a3a1c0699a1d4
SHA512

e4c3ae8a84679d8c05eacd160048bf98046fe25efab16e12c3759f1314f14930c8127a640af29ac0d85cd83e073775a384dfa474cc4d1cf5a3935229d506358e
SSDEEP

1536:0hYSOk+ac5boqXL6QozPIb/umpVvLX48JV0TdpHu4Eo5n1xesW+cd1GdxZbShX:06ZGQGgru+vLxJYnng1YxYX

Score

8^/10

bootkit discovery evasion persistence

Malware Config

Signatures

Disables Task Manager via registry modification
evasion

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	oxhzulzwrt.exe

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oxhzulzwrt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2124	taskkill.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2720	reg.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	taskkill.exe
Token: SeShutdownPrivilege	2584	oxhzulzwrt.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2584 wrote to memory of 2232	2584	oxhzulzwrt.exe	31
PID 2584 wrote to memory of 2232	2584	oxhzulzwrt.exe	31
PID 2584 wrote to memory of 2232	2584	oxhzulzwrt.exe	31
PID 2584 wrote to memory of 2232	2584	oxhzulzwrt.exe	31
PID 2232 wrote to memory of 2124	2232	cmd.exe	33
PID 2232 wrote to memory of 2124	2232	cmd.exe	33
PID 2232 wrote to memory of 2124	2232	cmd.exe	33
PID 2232 wrote to memory of 2124	2232	cmd.exe	33
PID 2584 wrote to memory of 1152	2584	oxhzulzwrt.exe	35
PID 2584 wrote to memory of 1152	2584	oxhzulzwrt.exe	35
PID 2584 wrote to memory of 1152	2584	oxhzulzwrt.exe	35
PID 2584 wrote to memory of 1152	2584	oxhzulzwrt.exe	35
PID 1152 wrote to memory of 2720	1152	cmd.exe	37
PID 1152 wrote to memory of 2720	1152	cmd.exe	37
PID 1152 wrote to memory of 2720	1152	cmd.exe	37
PID 1152 wrote to memory of 2720	1152	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\oxhzulzwrt.exe
"C:\Users\Admin\AppData\Local\Temp\oxhzulzwrt.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2584
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /f /im taskmgr.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2232
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im taskmgr.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2124
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c REG ADD hkcu\Software\Microsoft\Windows\CurrentVersion\policies\system /v DisableTaskMgr /t reg_dword /d 1 /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1152
- - C:\Windows\SysWOW64\reg.exe
    REG ADD hkcu\Software\Microsoft\Windows\CurrentVersion\policies\system /v DisableTaskMgr /t reg_dword /d 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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